Nuclear Data Sheets for A = 41

Abstract

A b s t r a c t :A v a i l a b l e i n f o r m a t i o n p e r t a i n i n g t o t h e n u c l e a r s t r u c t u r e o f a l l n u c l e i w i t h m a s s n u m b e r s A = 4 1 ranging from Al (Z=13) to Ti (Z=22) are presented. The experimental reaction and decay data are evaluated and a n y i n c o n s i s t e n c i e s o r d i s c r e p a n c i e s a r e n o t e d . T h e a d o p t e d v a l u e s f o r v a r i o u s l e v e l p r o p e r t i e s ( s u c h a s t h e spin, parity and and halflife) and gamma properties (energy, intensity and multipole character) are given. Since the prior evaluation several new measurements have expanded our knowledge of A=41 nuclides. The half-life o f t h e g r o u n d s t a t e o f 4 1 S i h a s b e e n d e t e r m i n e d a n d a s i n g l e e x c i t e d s t a t e i d e n t i f i e d . E x c i t e d l e v e l s i n 4 1 P h a v e b e e n o b s e r v e d f o r t h e f i r s t t i m e . I n 4 1 C l , s e v e n n e w e x c i t e d s t a t e s h a v e b e e n i d e n t i f i e d i n d e e p inelastic and heavy ion transfer reactions. Half-lifes for four states in 4 1 Ar have been updated and additional levels with gammas have been included from a new measurement using the multiple ion transfer reaction. In 41 Ca v i a c h a r g e -e x c h a n g e r e a c t i o n m e a s u r e m e n t s , s e v e r a l n e w e x c i t e d s t a t e s w e r e o b s e r v e d . A n u m b e r o f n e w resonances in 41 K have been identified via the (p,γ ) reaction. T h e r e r e m a i n s a s i g n i f i c a n t d i s c r e p a n c y i n t h e h a l f -l i f e o f t h e f i r s t e x c i t e d s t a t e ( 9 8 0 k e V ) i n 4 1 K , w i t h measurements differing by more than an order of magnitude. Transfer reactions suggest that this M1 transition s h o u l d b e l -f o r b i d d e n , h o w e v e r , s e v e r a l m e a s u r e m e n t s y i e l d a l i f e t i m e w h i c h s u g g e s t s a s i z a b l e M 1 s t r e n g t h .Further measurements to resolve the current conflicts would be beneficial.General Policies and Organization of Material: see http://www.nndc.bnl.gov/nds/NDSPolicies.pdf. Acknowledgments:The use of the NSR database (2014Pr09) and data from the XUNDL database has greatly helped to o p t i m i z e t h e e v a l u a t i o n t i m e . T h e e v a l u a t o r s t h a n k J . K T u l i a n d M . J . M a r t i n f o r u s e f u l d i s c u s s i o n s a n d J .Totans (NNDC) and L. Saddiq (ORNL) for providing some of the reference material. The careful and thorough review from A.A. Sonzogni is also greatly appreciated.

DUNE as the Next-Generation Solar Neutrino Experiment

“…For ν e,µ,τ + e − events, gamma rays can be produced through bremsstrahlung, but that is suppressed because the event energies are well below the critical energy of 32 MeV [45][46][47]. And for neu- tron capture, the total energy release is 6.1 MeV, with at most one gamma ray having substantial energy [72][73][74]. Further study is needed to assess the the potential to separate these event classes from each other (as well as from the less-important backgrounds due to ν e,µ,τ + 40 Ar events and spallation beta decays).…”

The first dual-phase xenon TPC equipped with silicon photomultipliers and characterisation with $$^{37}\hbox {Ar}$$

“…This required that the activation happened in two steps with a cool down time in between. 41 Ar decays into stable 41 K with a half-life of 109.6 min [24]. Hence, its activity decreased below 1 Bq after 2 days and was negligible after ∼ 160 days when the source was introduced into the detector.…”

Ab Initio Optical Potentials and Nucleon Scattering on Medium Mass Nuclei

“…(2) but are neglected by state of the art approaches. Note that there are more than 200 experimentally observed excitations already between the ground state and the neutron separation threshold in 41 Ca [49], while the SCGF-ADC(3) predicts only about 40 of them. This issue is likely to worsen at higher energies where configurations more complex than 2p1h become relevant.…”